chore(release): bump version to 5.1.1

chore: bump version

chore(release): release 5.0.0

Remove readonly modifier from Coordinate3D.cs and Coordinate2D.cs, so…

… unity can serialize them properly

Fix package in GitHub curl request

Merge remote-tracking branch 'origin/master'

Documentation (#1)

Created documentation and refactored interface

Removed obsolete things from README.md

Add one more test for `IsInBounds`